The National Weather Service predicts that Las Vegas will end March with record-breaking temperatures, with a forecast high of 92 degrees predicted for the weekend and a record-setting 88 degrees for Friday. The heat dome over the Southwest is weakening and temperatures are decreasing, indicating a decrease in humidity. The forecast high for Friday is 88, set in 2022. Despite this, Las Vegas is expected to see temperatures in the upper 80s until Monday. By the end of the month, the valley is likely to have recorded at least 10 90-degree days, an all-time record.